Crystal oscillators are loosely divided with the frequency they function at and whether they are fundamental oscillators—do the job for the frequency marked to the can or at even multiples of that (overtone oscillators). We existing a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output based upon the orthogonal https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html